W1-W3: Code Word Meanings

Question 1

S#

Answer 1

Spindle speed [RPM]

Question 2

F#

Answer 2

Feed rate [IPM]

Question 3

T#

Answer 3

Tool number

Question 4

M03

Answer 4

Clockwise spindle rotation

Question 5

M04

Answer 5

Counterclockwise spindle rotation

Question 6

M05

Answer 6

Stop Spindle

Question 7

M06

Answer 7

Tool Change

Question 8

M08

Answer 8

Coolant On

Question 9

M09

Answer 9

Coolant Off

Question 10

What does T# do ?

Answer 10

prepares the tool in that tool number

Question 11

What M code do we use to perform a tool change ?

Answer 11

M06

Question 12

What does the command S350 M03 do ?

Answer 12

Set spindle to 350 RPM

Rotate clockwise

Question 13

What M code do we use to stop the spindle ?

Answer 13

M05

Question 14

What does an F word command ?

Answer 14

Feed rate [IPM]

Question 15

How do we measure feed rate in imperial ?

Answer 15

inches per minute [IPM]

Question 16

How do we measure feed rate in metric ?

Answer 16

Millimetres per minute [MMPM]

Question 17

What is the axis and polarity for the tool moving away from the operator

Answer 17

Y positive axis

Question 18

What is the axis and polarity for the tool moving to the left ?

Answer 18

X negative axis

Question 19

What is the axis and polarity for the tool moving down ?

Answer 19

Z negative axis

Question 20

What is the axis and polarity for the table moving left ?

Answer 20

X positive

Question 21

What are the two main type of machining centres ?

Answer 21

Vertical and horizontal

Question 22

True or false : Only negative coordinates need a negative before the number

Answer 22

True

Question 23

What’s the proper notation for writing coordinates for positive and negative X,y,z coordinates

Answer 23

X1.0
Y2.0
Z2.0

X-1.0
Y-2.0
Z-3.0

Question 24

True or false: writing coordinates you do not need decimals

Answer 24

False : you need to include decimal writing coordinates in CNC code

Question 25

What’s special about G54 to G59 ?

Answer 25

They store the program zero coordinates

Question 26

Where should you place the program zero , anywhere of your choice ?

Answer 26

No, program zero should be carefully selected at the point where most dimensions are referenced from.

Question 27

True or false: Return zero and Program zero are the same thing.

Answer 27

False

Question 28

What is program zero ?

Answer 28

The zero reference point you create using the edge finder.

Question 29

What tool do you use to determine a program zero ?

Answer 29

Edge finder

Question 30

Explain the process in creating a program zero

Answer 30

Use an edge finder for the a corner Set the program zero for each x,y coordinate

Question 31

How do you manually move the x,y,z of the machine tool ?

Answer 31

Using the handle jog and handle jog increment values

Question 32

Where should the program zero be for round objects ?

Answer 32

At the centre

Question 33

Where should your program zero be for the z coordinate ?

Answer 33

At the top surface of the work piece

Question 34

What is G90 ?

Answer 34

Turns on absolute mode for G54 to G59 program zeros

Question 35

What is G91

Answer 35

Incremental mode

Question 36

Each command In a command line are called …

Answer 36

Words

Question 37

What is N - code

Answer 37

Command line identification number

Question 38

What are model words

Answer 38

Are commands that stay on until canceled or changed

Question 39

What is G00 ?

Answer 39

Rapid to x,y,z coordinate

Question 40

What is G01

Answer 40

Command to move in one of the coordinate axis x or y or z

Question 41

G20 G21

Answer 41

Inch mode mm mode

Question 42

What is G43 ?

Answer 42

Used to read H# which is a tool length

Question 43

What is H# ?

Answer 43

Stores the a tool length value

Question 44

How do you add comments to your code and where should they be placed ?

Answer 44

In brackets Under the program O - number

Question 45

How many G code can you add in one command line ?

Answer 45

Only 3

Question 46

What should you do if you have more than 3 G code in a row on the same command line ?

Answer 46

Move the others to the next command line